In situations where a raft foundation alone does not satisfy the design requirements, it may be possible to enhance the performance of the raft by the addition of piles. The use of a limited number of piles, strategically located, may improve both the ultimate load capacity and the settlement and differential settlement performance of the raft. This paper discusses the philosophy of using piles as settlement reducers and the conditions under which such an approach may be successful. Some of the characteristics of piled raft behaviour are described. The design process for a piled raft can be considered as a three-stage process. The first is a preliminary stage in which the effects of the number of piles on load capacity and settlement are assessed via an approximate analysis. The second is a more detailed examination to assess where piles are required and to obtain some indication of the piling requirements. The third is a detailed design phase in which a more refined analysis is employed to confirm the optimum number and location of the piles, and to obtain essential information for the structural design of the foundation system. The selection of design geotechnical parameters is an essential component of both design stages, and some of the procedures for estimating the necessary parameters are described. Some typical applications of piled rafts are described, including comparisons between computed and measured foundation behaviour.
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This book is ideal for engineering, physical science and applied mathematics students and professionals who want to enhance their mathematical knowledge. Advanced Topics in Applied Mathematics covers four essential applied mathematics topics: Green's functions, integral equations, Fourier transforms and Laplace transforms. Also included is a useful discussion of topics such as the Wiener–Hopf method, finite Hilbert transforms, the Cagniard–De Hoop method and the proper orthogonal decomposition. This book reflects Sudhakar Nair's long classroom experience and includes numerous examples of differential and integral equations from engineering and physics to illustrate the solution procedures. The text includes exercise sets at the end of each chapter and a solutions manual, which is available for instructors.
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An Empirical Ground-Motion Attenuation Relation for Inelastic Spectral Displacement
Title: An Empirical Ground-Motion Attenuation Relation for Inelastic Spectral Displacement
Journal: Bulletin of the Seismological Society of America
Vollume and Year: December 2006, v. 96
Pages: 2146-2164
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This second edition of this book, Nonlinear Random Vibration: Analytical Techniques and Applications, expands on the original edition with additional detailed steps in various places in the text. It is a first systematic presentation on the subject. It covers Markovian and non-Markovian solutions of nonlinear stochastic differential equations, exact solutions of Fokker-Planck-Kolmogorov equations, methods of statistical linearization, statistical nonlinearization techniques, methods of stochastic averaging, truncated hierarchy techniques, and an appendix on probability theory.
This spreadsheet, which I write using Excel VBA, generates Response Spectrum from the recorded EQ data using NEWMARK`S LINEAR ACCELERATION and INTRPOLATION EXITATION METHODS.
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Tip: Source Code is Included
Algorithm from the book entitle “Dynamics of Structures-Chopra”
Posted by: rcl1 - 02-11-2013, 07:06 AM - Forum: Archive
- No Replies
Can anyone help with getting the following paper?:
Astaneh-Asl, A., Bergsma, G., and Shen, J. H. (1992). Behavior and Design of Base Plates for Gravity, Wind and Seismic Loads. Proceedings of the National Steel Construction Conference
I hate to say this, but I have gotten 2 warnings back to back few weeks ago.
It is without saying that the warnings I've received were due to violation of one rule.
At the first time I received, I thought I violated other rule than the one that I did, so I repeated my mistake.
Hence, my suggestion is, when you describe which rule a user violate, use the rule number instead of description. Then, refer to the rule page. Personally, I think it's more logical to direct to the rule page instead of describing what user did wrong.
Author: Several | Size: 3.63 MB | Format:PDF | Quality:Original Preprint | Publisher: Kansas Department of Transportation | Year: Nov, 2011 | pages: 70 | ISBN: none
Soil nail walls are a widely used technology for retaining vertical and nearly vertical cuts in soil. A significant portion of the cost of soil nail wall construction is related to the construction of a reinforced concrete face. The potential for use of a flexible facing design for soil nail walls to replace reinforced concrete facing was evaluated using three-dimensional finite difference modeling and physical testing of a 1.5 meter by 1.5 meter unit cell of a soil nail wall in clay. A steel mesh form of flexible facing was used as a substitute for concrete. The finite difference model predicted large vertical and horizontal deformations for surcharges of approximately 5 psi. In the physical testing, the flexible facing products performed well with regard to strength, but the facing experienced large vertical and horizontal deformations that were consistent with the numerical modeling. Based on these results, it is recommended that use of flexible facing as a substitute for reinforced concrete be limited to non-critical structures where large vertical and horizontal deformations are acceptable.
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Folder Guard® is a powerful computer security program that you can use to control access to files, folders, and other Windows resources, such as Control Panel, Start Menu, and so on. You can use Folder Guard to lock your personal files and folders with passwords, to stop other users from peeking into your records. You can even completely hide your private folders from virtually all applications, and such folders would remain invisible until you enter a valid password. You can also protect sensitive system files from modification or destruction, disable access to the removable drives, restrict access to Control Panel, and more.
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